【Prevent Mineral Buildup】This humidifier demineralization filter helps prevent and reduce white dust caused by minerals in hard water. This hard water “dust” may contain calcium, lime or magnesium. Desalination filters can help extend humidifier life, purify water and prevent odor 【Compatible】Desalination cartridge works with HoMedics UHE-CM65, UHE- WM70, UHE-OC1, UHE-HDC4, UHE-CM45B, HE-CM25, UHE-CM25, UHE-WM16, UHE-OW14, UHE-WM85. Ultrasonic evaporative humidifier, warm and cool mist, most humidifiers like Vicks, LEVOIT, Honeywell, Homasy. 【Economical Water Purifier】Filter fits all HoMedics ultrasonic humidifiers 1 gallon or more. Each desalination cartridge can be used 30-40 times when full. 【Easy to Use】 Just put a humidifier carbon filter into your humidifier tank and it will start working. A humidifier cleaner can be used in humidifiers with a reservoir capacity of up to one gallon. Replace every 30-60 days. Dimensions: 1.8"L x 0.9"W 【Super Value Pack】Contains 10 packs.